About this product- Cctv Dome Dvr Night Vision Camera Tv-out SD Card* This camera is a complete DVR system solution. It has functions ofreal time viewing (video out), real timevideo recording(built-in Micro SD-Card storage), motion detection,night vision, photosensitive induction andcycle recording.* The key advantage when comparing with normal dome cameras, it can perform all functions as a dome camera, additionally it can do real time recording. No extra DVR devices required, cost saving and more convenient. * Simple operation, just insert a Micro-SD card,plug into a wall power socket, it will auto start video recording* Motion Detection, recording video when object motion being detected, it can save storage spac* Circular recording, when storage (Micro SD-card) is full,new video filewill replace the first one, second, third and so on, never worry about run out of storage. Files will be saved in 30mins per file* Built-in infrared LEDs, 24 IR LEDs are built-in, clearly see objects in dark environment or at night time* Using external storage media, support Micro SD-card, video filesare stored inside, Max. support up to 32GB (recommend using good quality cards, and the machine does not include a card by default)* A 4GB Micro SD-card can store upto 24hrs video files* 3.6mm camera LEN by default, the viewing angle is around 95 degree, 2.8mm camera is another option its viewing angle is 110 degree* To playback video, just take out the card plug it into computer (a card reader is included), recommend using "VLC media player"* Item Dimension : 92mm/3.5" Diameter* Suitable for security surveillance at homes, schools, shops, shopping malls and factories and soon